How to grow sweet grapes.?
Grapevines are a lot like people, some are sweet and some are sour! The variety that you have determines the flavor. You obviously have an old but popular variety that was one of the few avaiable many years ago before we started to hybridize grapes to get the qualities that we wanted. Sweet, desert grapes are very popular now and available from most plant growers. There is NO WAY to turn an acidic grape into a sweet one. If you still want to make wine, keep the one you have. If you want a table grape search the websites for online catalog that features grapes and look at the descriptions offered. Find your growing zone and pick one that will prosper there.
